Improved book-dbillim machine



E miem ".Pm PHOWUYMOGRPHER. WASHINGTON D E @uiten tette atnt ,t'fitt.

Letters Patent No. 80,232, dated Julyo 21, 1868.

IMIRDVBD BOOK-DRILLING MACHINE.

die ttemlt referat tu im ,there ettert @that gmt making gaat nf the sztm.-

T0 ALI. WHOM IT MAY CONCERN# v Be it k'nown that I, JOHN C. SMITH, of Troy, in the county of Rensselaer, and in the YState of New York, have invented certain new andvuseful Improvements in Rock-Drilling Machines; and do hereby declare that the following is a. full, clear, and exact description thereof, reference being had to the accompunyi'nyg,` drawings and to the letters of 'reference marked thereon.

Y The nature oiemy invention consists in the general arrangement of -an -adjustable self-feeding machine for drilling maks. l In order to enable others skilled inthe art toma-ke and use my invention, I will now proceed to describe its construction'vand operation, referring to the annexed drawings, Awhich form a'part of this specification, and

in which Figure 1 is a front elevation. Figure 2, a side section of the jaws enclosing the drill-shaft. Figure 3, a plan view of the self-feeding arrangement.- Figure 4, a plan view of the arrangement by'whch the drillshaft is thrown in and out of gear-'with the selffeeding arrangement. Y i

-Figure 5, a plan view of theupper divided jaw enclosingthe drill-shaft.

Figure 6 shows the drill-point, and Figure 7 is aside elevation of the frame, showingthe device for adjusting thesame. g A represents a bottom or bedfpieee, in the front end of which are two standards, EE, which extend forwards and support the frame B, wherthe same is placed in vertical position thereon;

The said frame B is pivoted to ears, ou the rear corners of these standards, by means of screws e c, passing through 4said ears and through the lower rear corners of `the frame.

W One of the standards is also provided with a circular plate, C, extending upwards, whiehfplate has a series j of notches, a a, cut in its upper edge, intowhich notchesthelug s, on the lower'side ofthe lever D, fits. I The said lever D beingv pivoted on the side of the frame B, and held firuily in place, when the lug is inserted into one oi" the notches, by means of a. bevelled pin, t', also o n the side of. the frame, the said frame can, by this arrangement, be adjusted at any angle desiredr The shaft b, which is turnedby ineens of the cranks F F, has its bearings in the'sides ofth'elframe B, and` is provided, inside of said frame, with a. driving-wheel, G.

Said driving-wheel1vorks in the pinion Il on the crank-shaft c, which also has its bearings in the frame Bp below the former shaft, and is provided with two {1y-wheels, I I. Y

The crank-shaft c works in between the jaws J and J above it, and the jaw K below it, saidjaws'being joined at their rear ends to a head-piece, L, which moves up and down onan upright stationary rod, M, placed 4in the centre of the rear side of the bottom of theframe B, for the purpose of guiding said head-pieeeand jaws in their movement up and down, when moved by the crank-shaft.

The lowerjaw, K, which is slotted to allow the drill-shaft to pass through it, is .hinged or pivoted `at-its rear end to the lowerside of the head-piece L, and is held-'up close to the crank-shaft' .by meansV of a bar,- d,

which bar is fastened to it, and passes up between the upper` jaws J, and J', being above the same, Vseeuredtore. spring-plate, e, which is fastened to the upper` side of `the'head-piece, and ,which can b'e regulatedpat willby means of a screw, g, passing up from beneath said head-piece, and striking fthe lower side of the spring.

'lhe jaws J and J are hinged or pivoted on the sides of the head-piece', and eachprovided with a half nut, and so arranged that, when closed together, they. form a perfect nut,f, for the drill-shaft'N to pass through, holding it at the sa'me time iirmly, as said drill-shaft is provided with screw-threads, which lit in the nutthus formed. e p

The jaws J and J are held togethertlrmly, when closed, vby means `of a hook, h, opone, and a pin, z', on the other, or by any other suitable deviceansw-ering the same purpose.

thus turning the collar O.

The jaws are so arranged that the drill-shaftlis placed near their centre, between the head-piece and the forward end of said jaws, where the crank-shaft moves, v I

The crankshaft N passes throughs flanged collar, O, in the crosspiece-I, on the top of the frame B, and also through the bottom of the frame,at which end it is provided With'a screw-nut for the insertion of the drill` point This drill-point is bevelled, so as to form a sharp edge at' its end, and one of the sides of said bevelled point, thus formed, is also bevelled off, as shown more'plain'ly in iig. 6. l I A The ilanged collar, through ivhieh the drill-shaft passes, is provided on its lower side, below the cross-.bar

P, with rods or bars c c, which extend doivnivards and eonnect'with the'u'heel -R,-said Wheel being placed aroundA the drill-sliaft, and is providedivitli pins or lugs/m m, on the outside edge, which lugs are placed at such distance from each other that they will fit and workinto screw-threads on .the main'dri'vingfshaft b, as shown in iig. 3,

The upper side of said collar, above the cross-bar?, is provided with a lever, n, which has a lug, o, on one side. This lug. may be placedin a vertical groove, p, on the upper part 'of the drill-shaft, sothat When'the machine4 is in operation, and the collarrO is turning, by inse'rtingthis lug into saidgroove, the drill-shaft obtains a rotary motion, as well 'as an `lip-and-down motion, and by means of the screivon the saine, whichts into the nut f, already"described, on the upper jaws, it becomes' self-feeding, and gradually sinks-lower into the rock. Having thus' fully described invention, what I-claim as new, and desire to secure by Letters Patent", is- 1.v Thejaws'J, J', and K, constructed as described, andjoined .to the head-piece L, in combination with the crank-'shaft c and stationary rod M, for the purpose of giving an up-and-down motion to the drill-shaft N, subl stantiallyas and for the purposes herein set torth.

2. 'Ihe `wheel-R, constructedas described, with lugs 'm m, Vworking in the screw;threads on th'e shaft and connected by means `of rods k k with the anged. collar O, in combination with the lever hand lug o, on said bollar, and the groove p, on the drill-shaft N, for the purpose of givingv said drill-shaft afrotary motion, subv stantially as undfor the purposes herein set forth.

' 3. '.lhe arrangement of. the driving-Wheell G, pinion H, .crank-shaft c, yand ily-wheels I I, when constructed as described, end nsed, in combination with the jaws J, J', and K, for the purpose of giving motion toga drillshaft, in drilling rock, substantially as herein set forth, v l I In testimony that I claim the foregoing, I have hereunto set my hand, this l12th day of June, 1868.

' JOHN e. sMITH.

Witnesses:

` WM. H. MASON,

J. M. MAsoN. 

